We don't know when exactly we will have the manuals for the K-r and K-5 available for download. It can sometimes be a few months after the release of a camera before they are posted on the website. You might try connecting to the Pentax Japan site to monitor for availability too.
http://www.pentax.jp/english/support/download_manual.html

If you are in need of further assistance, please respond to this email or call our technical support center at 800-877-0155.